Rotary air-compressor.



0. C. BUSS. ROTARY AIR COMPRESSOR.

APPLICATION FILED APR. I5, l9l0- '1 ,1 92,855, Patented Aug. 1,' 1916.

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I N VEISITOR 7 4 4 II- .56 a

HIS ATTORNEY HY FACTJ O. C. BUSS.

ROTARYAIR COMPRESSOR.

APPLICATION FILED APR. 15. 1910.

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WITNESSES; Q Z

I HIS TTORNEY IMPACT.

' zen of the Republic of Switzerland, residing To all whom it may concern UNITED l S o'r'ro o. Buss, F HAVRE, FRANCE, ASSIGNOR "r0 socni'rr'i ANONYME POUR L'ExPLoITA- lTIoN' Es rnocnnr'is wEsTmonoUsE-LEBLnNc, 0F PARIS, FRANCE; v

' ROTARY AIR-COMPRESSOR. i

Specification of Letters Batent.

Appl ication filed Atria 15, 1910. "Seria1No.555,718.

Be it known that I, O'rro C. Buss, a citiat 2 Boulevard Sadi-Carnot, Havre, France, have invented a new and useful Improvement in Rotary Air-Compressors, of which the followingis aspecification. v

This invention relates-to rotaryair pumps of the Well known Westinghouse-Leblanc ,driven' turbine.

type in which the air or other fluid to be extracted is entrained by jets, streams -or sheets of water or other liquid which are projected into the suction or vacuum cham ber of the pump; by means of a reversely The liquid and entrained air or other fluid which may include also condensed vapors is forced through a nozzle, then through a combining tubeor chamber into a second diverging nozzle from which the extracted fluid and liquid are discharged.

I have found by experiment that the pressure in'the combining tube or chamber above mentioned can and usually will be-greater than the pressure in the suction or vacuum, chamber-of the pump unless of course these two chambers are connected together by a. conduit as .is the case when the apparatus is employed as a steam condenser as shown in According to'my invention I connect the combining tube orchamber in the apparatus above mentioned to a chamber or space wher it is desired to maintain a less vacuum than in the main suction or vacuum chamber of. the pump, by which means I am enabled with a single pump to extract air or other gases from two places where different pressures exist. By dividin the combining tube "or chamber into several parts a number of difl'erent chambers may be exhausted to different pressures with the same pump if desired.

In order that the nature of the invention may be clearly understood the same will now be described with reference to the accompanying drawings in which a Fig. 1 is a vertical sectional view of a Westinghouse Leblanc condenser or pump and Fig. 2 is a'similar view showing the invention applied thereto: Fig. 3 is a diagrammatic View showing the invention as applied to a sugar refining plant in which a .plu-

view similar. to Fig 2, ,illustrating a comprisesawacuum chamber 2 in whichis Patented Aug; 1,1916.

ralit y of vacuum pansfare employed: Figci' 7 1s a. modified construction,

mounted a reversely driven turbine-wheel 3 1;

which is supplied with liquid-from av nozzle 4 :arranged'on the inside of, the said wheel, The turbine wheel 3isdrivenby 'anysultkable means .and is providedivith .bladesjo by which the liquid is projected intoetbci vacuum chamber in -j ets',-streams. or sheets, and forced together, with the entrained. air and condensedjsteam; through a nozzle 6 located-in the lower portion of the vacuum chamber 2. The nozzlea(iicommunicates:with .1,

a combining tube or -chamber 7,wl1'ich ;is.in open communication with the atmosphere or hot well by means of a converging-diverging nozzle 8. The chamber 7 is connected with the vacuumchamber 2 of thecondenser-by means of a passage 25 the condenser casing.

formed in the .wall of I have found that if ing from the vacuum chamber 2.to the chamber 7 is omitted, the pressure in the chamber 7 will be increased and will.consequently become greater e than the pressure existing, ;i n the vacuum chamber 2 According to my invention, as shown in Fig, 2, the chamber? .is connected by a pipe9 to a point where a pressure greater than the pressure in the chamber .7 exists, by which means air-and incondensable gases are extracted from this point without in any way altering the degree of vacuum maintained in thebvacu unr chamber 2 and without increasingxin, any way the power required by the apparatus. As an example, with an air pump. of this description capable of producing vacuum of736 mm; of mercuryat. a barometric p ressureof 748 min., I have found that a; series of converging nozzles 'offlvarious diameters may be employed for connecting the, chainber 7 to the atmosphere and the vacui uii in the vacuum chamber 2 stillmaintai'ned ,cqual 1 to a pressure of .73omm;, z inert-my periments have'been *madeflwitli no /J sol various dimensions, the diaiiictcrs at the-neck of the variousnozzles empli'rvcd' being as follows: 2 1pm., 4 ,mm., di -m n .8 m n, 10 mm., 12 mnt, '14 mm., 16 mmI The VaCLlum -inthe'v acuum chamber 2 being equal to 736 mm. the following degreesof vacuum were obtained in chamber 7 Without a nozzle 710 mm.

Thercfore with a single pump it is possible to extract the incondensable gases from two points where different pressures exist. 1

In Fig. 3 I have indicated how my invention may be applied to a series of vacuum pans in sugar refining apparatus, such a series of pans being commonly. known as a. multiple effect. In this figure the main suction lO/df the air pump 11 is connected to an injection or surface condenser 12 which in turn is connected to the last pan 13, of a series of similar pans 14, 15, 16, 17,.18, forming a sextuple effect in which pan 13 the maximum degree of vacuum exists (93% of the barometric pressure for example.) The converging nozzle 19 of the pump which is located in the chamber 7 and is connected by pipe 9 to the second pan 14 of the series where a vacuum in the neighborhood of 6.0%

of the barometric pressure is maintained. It

will be seen that the incondensable gases coming from the vacuum chambers of the reservoirs 18, 17,16, 15, or from the air inlets in the' sy' stem in which the vacuum is to be obtained, up to this chamber being previously exhausted, the vacuum in the condenser will be greatly improved. Actual experiments made on a system of this description, the barometric pressure being 7l8 mm., showed that. the vacuumobtained in the vacuum chamber of the condenser, the passage 25 being omitted as'betore explained so that the chamber"? v was closed, did not-exceed 660 mm. of mercury; on the other hand, the chamber 7 being connected to the outlet of the second pan as shown in Fig. 3, the vacuum in, the condenser and in the suction 10 of the air pump corresponded to apressure of 7 698 mm. of mercury, while the vacuum in the chamber 7 and the outlet of the second pan corresponded toa pressure of 500 mm. of mercury, the working conditions remaining strictly the same, A similar arrangement may be employed in connection with injection condensers in which the air is extracted from the injection water prior to its entrance into the condenser. It is suflicient for this purpose to connect the chamber 7 of the air pump to an air separating chamber located between the condenser and the source of supply of condensing water, and adapted to free the air dissolved in the water prior to its entrance into the condenser, the outlet for the air from the condenser being connected to the chamber 2.

Instead of connecting the chamber 7 to a single reservoir, a plurality of reservoirs may be exhausted to a different degree of vacuum, in which case a series of nozzles 19, 20, 21 are provided having inlets 22, 23, 24 formed inthe wall of the chamber 7 adjacent to and on the underside of each nozzle connected respectively to the several reservoirs; such an arrangement is possible I with the device which is shown in Fig. 4.

liquid into said chamber between the inlet and outlet thereof and one or more fluidinlets betweenthe entrance point of said liquid and said fluid outlet. g

2. An apparatus of the character described, comprising an admission chamber, having a fluid admission port and adischarge port, a combining chamber communicating with the discharge port and provided with at least one auxiliary fluid admission port, a divergent discharge nozzle communicating with said combining chamber and means for projecting an interrupted stream of liquid at a high velocity into said admission chamber and through said combining chamber and said discharge nozzle, said means comprising a partial ejection rotatable impeller.

v3. An' apparatus'of the character described, comprising an admission chamber having a fluid lnlet, a discharge nozzle communicatlng with said chamber, a combining chamber,communicating with said nozzle and provided with separate admission ports, convergent tubes extending across and dividing said combining chamber into separate sections each of which communicates with one of said ports, and a liquid impeller located between the inlet of said admission chamber and said nozzle for 1 discharging liquid through said nozzle, said combining tube, and said diffuser.

In testimony whereof I have hereunto subscribed my name this'fourth day of April, 1910, v OTTO O. BUSS.

Witnesses:

JOHN PRESTON BEEoHER, OoNsTA'NT GUIRARD.

copies or this patent may be obtained for five cents each, by addressing the "Commissioner of Xatentc,

Washington, D, G. i 

